My goal this year is to ride EVERY day to school. A short commute. I just re-purchased a Trek 7.2 FX with fenders and a rack as a commuter. I'd like recommendations on panniers. I used the grocery panniers on my fx I sold last year. If I'm going to be riding in the rain, snow, sleet and gloom of short days, I don't think the grocery/open top pannier is going to work. Anyone have a pannier they can recommend? Thanks.